Wow, I looked at this plane online as well as the sellers other items. I spotted the following knock-off's:

Great Planes Ultra Sport .40+
Great Planes Rapture .40 (also sort of a knock of Sig since the called it the "Four Star Bird")
Sig Rascal
World Models Ultimate .40
Hangar-9 Sundowner
Hangar-9 Ultra Stick (covering scheme anyway)
Great Planes Big Stik (There are a lot of Stiks out there but they seemed to have "borrowed" the picture from the Tower Hobbies site)

These are just the ones that jump out at me. As tempting as that US-40+ knock-off is I just can't support a seller who rips stuff off like that.